ci(contributors): simplify contributor check using step outcome

- Replace brittle grep check with exit code-based branching
- Use continue-on-error and conditional report generation

Generated-by: GitHub Copilot <copilot@github.com>
Signed-off-by: Ashley Childress <6563688+anchildress1@users.noreply.github.com>

.github/workflows/contributors.yml

@@ -32,22 +32,19 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
-      - name: Check and report contributors
-        run: |
-          CHECK_OUTPUT=$(npm run contributors:check 2>&1)
-          echo "$CHECK_OUTPUT"
+      - name: Check contributors
+        id: contributors_check
+        run: npm run contributors:check
+        env:
+          PRIVATE_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        continue-on-error: true
 
-          if echo "$CHECK_OUTPUT" | grep -q "Missing contributors"; then
-            echo "Missing contributors detected, generating report..."
+      - name: Generate contributors report
+        if: steps.contributors_check.outcome == 'failure'
+        run: |
           mkdir -p reports
           npm run contributors:report
-
-            if [ -f reports/contributor-report.md ]; then
-              cat reports/contributor-report.md >> $GITHUB_STEP_SUMMARY
-            fi
-          else
-            echo "No missing contributors found"
-          fi
+          test -f reports/contributor-report.md && cat reports/contributor-report.md >> "$GITHUB_STEP_SUMMARY"
         env:
           PRIVATE_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         continue-on-error: true